About: http://webisa.webdatacommons.org/78771040

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Tipler first described a working time machine through his theory of massive rotating spheres??? Certain types of black holes also exhibit the time travel abilities of Tipler cylinders.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com